What is nspire cx?

Some articles on nspire, nspire cx:

TI-Nspire Series
... The TI-Nspire product line is a series of graphing calculators developed by Texas Instruments ... This line currently includes the TI-Nspire, TI-Nspire CAS, TI-Nspire CX and TI-Nspire CX CAS ... updated the calculators to the Touchpad versions which come with the Nspire or Nspire CAS computer software and support optional rechargeable batteries ...
Comparison Of Texas Instruments Graphing Calculators
... Port 2004 TI-83 Plus TI-84 Plus Silver Edition, TI-Nspire TI-84 Plus Silver Edition Zilog Z80 @ 15 MHz 128/48 KB of RAM (24 KB user accessible), 2 MB of Flash ROM (1.5 MB user ...